Delays for rush-hour commuters in Christchurch will continue this week, with the number of infrastructure rebuild projects in the central city said to be at a peak.

The Stronger Christchurch Infrastructure Rebuild Team (SCIRT) has advised motorists to keep using the four avenues for getting across town as work in the central city is at a peak.

Christchurch Transport Operations Centre (CTOC) Ryan Cooney said a push for infrastructure repairs in the CBD was nearing its end.

"We're at our maximum traffic impact [now], we'll start to ease off over the coming months."

"We're on the improve from a transport perspective."

Fitzgerald Ave is a reliable route for north and southbound journeys, while Montreal St can be used for northbound travel, and Colombo and Manchester streets can be used to access the central city from Bealey Ave, Scirt says.

Repair work is continuing on Manchester St, restricting the road to southbound traffic only between Kilmore and Armagh streets.

A detour is in place for northbound traffic.

Durham St continues to be reduced to one lane between Kilmore and St Asaph streets, while the intersection of Madras and St Asaph streets is also down to one lane because of wastewater repair work.

Alcester St near the South City Centre will be closed for about two weeks, but motorists can still access to the mall's car park from Colombo, Bath and Winchcombe streets.

Outside the central city, Avonside Dr remains closed between Stanmore Rd and Linwood while wastewater repairs are carried out, while Woodham Rd is one way for two weeks, with a detour in place for westbound traffic.

The Gayhurst Road Bridge will also be closed from today for demolition and rebuild work.

Motorists are advised to use New Brighton Rd, North Pde, North Avon Rd, Swanns Rd, Avonside Dr and Woodham Rd.

A temporary footbridge is available for pedestrians and cyclists via Rupert Pl on the northern side of the river and between Gloucester and Ngarimu streets on the southern side.

Rooney said the area had a number of works taking place at the same time, and was "going to become difficult to manage".

This meant it was even more important for motorists to check the state of the network before leaving home. The Transport for Christchurch website provided real-time updates.